Income Taxes (Tables)

12 Months Ended

Jan. 31, 2016

Income Tax Disclosure [Abstract]

Schedule of Loss Before Provision (Benefit) For Income

The components of loss before provision (benefit) for income taxes were as follows (in thousands):

	Year Ended January 31,
	2016			2015			2014
United States	$	(155,794	)	$	(132,084	)	$	(148,032	)
Foreign		(46,464	)		(36,712	)		(22,956	)
Total	$	(202,258	)	$	(168,796	)	$	(170,988	)

Schedule of Provision (Benefit) For Income Taxes

The components of the provision (benefit) for income taxes were as follows (in thousands):

	Year Ended January 31,
	2016		2015			2014
Current:
Federal	$	29	$	25		$	17
State		146		135			53
Foreign		298		670			89
Total	$	473	$	830		$	159
Deferred:
Federal	$	61	$	(1,009	)	$	(2,360	)
State		—		(109	)		(230	)
Foreign		156		(281	)		—
Total	$	217	$	(1,399	)	$	(2,590	)
Provision (benefit) for income taxes	$	690	$	(569	)	$	(2,431	)

Schedule of Reconciliation of The Federal Statutory Income Tax Rate And The Provision For Income Taxes

The items accounting for the difference between income taxes computed at the federal statutory income tax rate of 34% and the provision for income taxes consisted of the following (in thousands):

	Year Ended January 31,
	2016			2015			2014
Tax benefit at federal statutory rate	$	(68,767	)	$	(57,391	)	$	(58,136	)
State taxes, net of federal benefit		(8,799	)		(5,322	)		(5,071	)
Foreign rate difference		6,744			4,043			3,270
Nondeductible expenses		429			451			3,408
Research and development credit		(3,533	)		(2,396	)		(1,934	)
Stock-based compensation		6,214			4,703			2,644
Change in reserve for unrecognized tax benefits		3,562			2,421			3,937
Other		61			709			(421	)
Change in valuation allowance		64,779			52,213			49,872
Provision for income taxes	$	690		$	(569	)	$	(2,431	)

Schedule of Components of Deferred Tax Assets and Liabilities

The significant components of our deferred tax assets and liabilities were as follows (in thousands):

	January 31,
	2016			2015
Deferred tax assets:
Net operating loss carryforward	$	184,301		$	142,935
Accruals and reserves		26,412			11,917
Stock-based compensation		11,627			7,478
Depreciation and amortization		6,217			3,329
Tax credit carryover		4,002			4,005
Total deferred tax assets		232,559			169,664
Valuation allowance		(232,211	)		(167,436	)
Total deferred tax assets, net of valuation allowance		348			2,228
Deferred tax liabilities:
Acquired intangible assets		(223	)		(1,947	)
Other		(61	)		—
Total deferred tax liabilities		(284	)		(1,947	)
Net deferred tax assets	$	64		$	281

Schedule of Reconciliation of Unrecognized Tax Benefit

A reconciliation of the gross unrecognized tax benefits is as follows (in thousands):

	Year Ended January 31,
	2016		2015			2014
Unrecognized tax benefits—beginning of period	$	13,607	$	8,147		$	2,515
Additions for tax positions related to prior year		238		43			547
Reductions for tax positions related to prior year		—		(19	)		—
Additions for tax positions related to current year		6,811		5,436			5,085
Unrecognized tax benefits—end of period	$	20,656	$	13,607		$	8,147